Jozy Altidore jogged Friday at the U.S. men's national team's practice session, and coach Jurgen Klinsmann said the forward’s strained left hamstring could be ready by Tuesday’s World Cup elimination game against Belgium.

The day marked the third in a row that Altidore has jogged. Trainers stretched him out after the light run around the practice field, according to several reports. He didn't appear to limp or favor the leg.

United States forward Jozy Altidore (17) grabs his leg while falling to the ground during the first half of their 2014 World Cup game against Ghana on June 16, 2014 at Estadio das Dunas. (Winslow Townson/USA TODAY Sports)

“We are very optimistic to have him to be a part of the Belgium game,” Klinsmann said. "Every day is a big step forward.”

Altidore strained his hamstring 23 minutes into the United States' opening game against Ghana, a 2-1 victory. He missed a 2-2 draw with Portugal and a 1-0 loss to Germany. Team spokesman Michael Kammarman said Altidore's official status is "uncertain."